CVE-2026-74413 (GCVE-0-2026-74413)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:46
VLAI
Title
wifi: rtw89: fix wrong pci_get_drvdata type in AER handlers
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: fix wrong pci_get_drvdata type in AER handlers rtw89 stores an ieee80211_hw pointer via pci_set_drvdata() at probe time, but io_error_detected() and io_resume() retrieve it as a net_device pointer. This causes netif_device_detach/attach to operate on an ieee80211_hw struct, reading and writing at wrong offsets. The adjacent io_slot_reset() already does it correctly. Use ieee80211_stop_queues/wake_queues instead, consistent with every other queue stop/start path in the driver. Tested on RTL8852CE by calling the handlers from a test module before and after the fix.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3 , < aefc30e4a829c1683f6ae999df7f9310c27eae6c (git)
Affected: 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3 , < c1907b9a4fa9cb33d11a9af138374dd2e93f7a93 (git)
Affected: 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3 , < 7068c379cf9aa8afe4dce4d9d82390187aa9c4d0 (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/pci.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: fix wrong pci_get_drvdata type in AER handlers\n\nrtw89 stores an ieee80211_hw pointer via pci_set_drvdata() at probe\ntime, but io_error_detected() and io_resume() retrieve it as a\nnet_device pointer.  This causes netif_device_detach/attach to\noperate on an ieee80211_hw struct, reading and writing at wrong\noffsets.  The adjacent io_slot_reset() already does it correctly.\n\nUse ieee80211_stop_queues/wake_queues instead, consistent with\nevery other queue stop/start path in the driver.\n\nTested on RTL8852CE by calling the handlers from a test module\nbefore and after the fix."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
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              "lang": "en",
              "value": "AV:A - The vulnerable rtw89 PCIe AER handlers run when the adapter reports non-fatal/fatal PCIe errors; on laptops with RTL8852CE/8852BE and similar in public wireless environments, an adjacent attacker can plausibly induce link faults via traffic stressing the radio-PCIe path.\nAC:L - Once AER recovery invokes rtw89_pci_io_error_detected/resume, the type confusion deterministically treats ieee80211_hw as net_device and corrupts memory through netif_device_detach/attach; no race or layout guesswork beyond triggering PCIe recovery is needed.\nPR:N - No local OS privileges or capabilities are required; an adjacent wireless attacker targeting a victim\u0027s rtw89 PCIe WiFi can enter the faulty AER recovery path without authenticating to or holding an account on the system.\nUI:N - No victim action beyond normal use of the affected rtw89 WiFi interface is required; PCIe AER recovery and the corruption run automatically in kernel interrupt/workqueue context.\nS:U - Type confusion corrupts kernel memory within the same kernel security authority; no VM, container, or IOMMU boundary is crossed.\nC:H - Casting ieee80211_hw to net_device makes netif_device_detach/attach read state, flags, and queue metadata at wrong offsets, constituting type confusion that can disclose adjacent kernel memory per kernel CVSS guidance.\nI:H - Atomic bit clears/sets and netif_tx_stop/wake queue operations run on ieee80211_hw memory misinterpreted as net_device fields, enabling out-of-bounds writes and exploitable memory corruption warranting High integrity impact.\nA:H - Misinterpreting ieee80211_hw as net_device leads netif_tx_stop_all_queues and netdev_watchdog_up to dereference garbage queue pointers, causing kernel oops/panic during AER recovery with High availability impact."
            }
          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:46:57.094Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/c1907b9a4fa9cb33d11a9af138374dd2e93f7a93"
        },
        {
          "url": "https://git.kernel.org/stable/c/7068c379cf9aa8afe4dce4d9d82390187aa9c4d0"
        }
      ],
      "title": "wifi: rtw89: fix wrong pci_get_drvdata type in AER handlers",
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    "datePublished": "2026-08-15T05:59:20.021Z",
    "dateReserved": "2026-08-15T05:44:03.893Z",
    "dateUpdated": "2026-08-17T05:46:57.094Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: fix wrong pci_get_drvdata type in AER handlers\n\nrtw89 stores an ieee80211_hw pointer via pci_set_drvdata() at probe\ntime, but io_error_detected() and io_resume() retrieve it as a\nnet_device pointer.  This causes netif_device_detach/attach to\noperate on an ieee80211_hw struct, reading and writing at wrong\noffsets.  The adjacent io_slot_reset() already does it correctly.\n\nUse ieee80211_stop_queues/wake_queues instead, consistent with\nevery other queue stop/start path in the driver.\n\nTested on RTL8852CE by calling the handlers from a test module\nbefore and after the fix."
          }
        ],
        "id": "CVE-2026-74413",
        "lastModified": "2026-08-17T06:19:36.790",
        "metrics": {
          "cvssMetricV31": [
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                "baseSeverity": "HIGH",
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                "privilegesRequired": "NONE",
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      "current_release_date": "2026-08-20T22:18:56+00:00",
      "cve": "CVE-2026-74413",
      "id": "CVE-2026-74413",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: rtw89: fix wrong pci_get_drvdata type in AER handlers",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74413.json",
      "version": "3"
    }
  }
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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